155
Appendix
z
Battery life is short
y
Make sure the handset is not left for a long time outside the
service area. Outside the service area, since radio waves are
searched to make communication available, more electric
power than usual is used.
When the handset keeps out of service, turn power off or set
Airplane mode.
☞
P. 43 “Turning power off” , P. 110
“Network & internet”
y
The battery life depends on the usage environment and
deterioration level.
☞
P. 161 “Main specifications”
y
The internal battery is a consumable product. Battery life per
charge is gradually reduced every time the battery is charged.
Contact the support phone number listed on the Warranty
Card if the battery life becomes extremely shorter than at the
time of purchase even after fully charged.
☞
P. 24
“Replacing the built-in battery”
y
End apps which are not in use.
y
Set wireless functions which are not in use to OFF.
☞
P. 110
“Wi-Fi” , P. 144 “Using Bluetooth function”
y
Conserve the battery power by using Battery Saver.
☞
P. 118 “Battery Saver”
z
Not activated by touching or pressing keys
y
Make sure the handset is not turned off.
☞
P. 43 “Turning
power on”
z
Screen response is slow when touching or pressing keys
y
This may happen when a great deal of data is saved on the
handset, when a large amount of data is being transferred
between the handset and the microSD Card, etc.
☞
P. 125
“Storage”
z
nanoSIM Card is not recognized
y
Is the nanoSIM Card inserted facing right direction?
☞
P. 36 “nanoSIM Card”
z
Clock is incorrect
y
Clock may become incorrect if the power is left turned on for a
long time. Make sure [Automatic date & time] is set to ON and
turn the power on again in a location with good signal
conditions.
☞
P. 138 “Date & time”
z
Handset operation is unstable
y
The apps installed on the handset after purchase may become
a cause. If you can improve the symptoms by activating the
handset with the safe mode set, you may be able to improve
the symptoms by uninstalling the installed apps.
* Safe mode is a function to start up the handset in a state
close to that at the time of purchase.
y
For activating the safe mode
Turn the power on again when the power is turned off, then
keep pressing
2
on the screen during activation until the
lock screen of the touch panel is displayed.
* Alternatively,
9
while the power is turned on
(for at least 2 seconds)
▶
touch and hold [Power off]
▶
[OK]
to activate the safe mode.
* When the safe mode is activated, [Safe mode] is
displayed at the bottom left of the screen.
* To deactivate the safe mode, turn the power on again.
y
Back up the necessary data in advance before using the
safe mode.
y
Depending on the widget, it may disappear.
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